not enough input arguments

syms x

f = input('Enter the function f(x):');

I = input('Enter the interval: ');

a=I(1);b=I(2);

df = diff(f,x);

ddf = diff(df,x);

f = inline(vectorize(f));

df = inline(vectorize(df));

ddf = inline(vectorize(ddf));

range = linspace(a,b,100);

plot(range,f(range),'-b','LineWidth',2);

legstr = {'Function Plot'}; % Legend String

hold on;

%%%%%%%

% Due to limitations in symbolic toolbox we find the zeros of

% f’(x) numerically.

%%%%%%%%%

guesses = linspace(a,b,5);

root = zeros(size(guesses));

for i=1:numel(guesses)

root(i) = fzero(df,guesses(i));

end

root = root(a <= root & root <=b);

root = unique(round(root,4));

plot(root,f(root),'ro','MarkerSize',10);

legstr = [legstr, {'Critical Points'}];

disp(['Critical Points of f(x) are: ',num2str(root)])

%%%%%%%

%We categorize the critical points by the second derivative test

%%%%%%%%%%

maxp = root(ddf(root) < 0);

if(numel(maxp) ~= 0)

disp(['Local maximum of f(x) occurs at: ',num2str(maxp)])

end

minp = root(ddf(root) > 0);

if(numel(minp) ~= 0)

disp(['Local minimum of f(x) occurs at: ',num2str(minp)])

end

fval = f(root);

if(numel(maxp) ~= 0)

gmax = root(fval == max(fval));

disp(['Global maximum of f(x) occurs at: ',num2str(gmax),' and its valueis:', num2str(max(fval))])

plot(gmax,f(gmax),'m+','MarkerSize',10);

legstr = [legstr, {'Global Maximum'}];

end

if(numel(minp) ~= 0)

gmin = root(fval == min(fval));

disp(['Global minimum of f(x) occurs at: ',num2str(gmin),' and its valueis: ', num2str(min(fval))])

plot(gmin,f(gmin),'m*','MarkerSize',10);

legstr = [legstr, {'Global Minimum'}];

end

legend(legstr,'Location','Best')

Enter the function f(x):

x^2*exp(sin*x)-x/x^3=1

x^2*exp(sin*x)-x/x^3=1

↑

Incorrect use of '=' operator. Assign a value to a variable using

'=' and compare values for equality using '=='.

Enter the function f(x):

x^2*exp(sin*x)-x/x^3+1

Error using input

Not enough input arguments.

Enter the function f(x):

Answer 1

[DGM]

syms x
f = x^2*exp(sin*x)-x/x^3+1;

Error using sin
Not enough input arguments.

f = x^2*exp(sin(x))-x/x^3+1; % ?